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Analog Devices Inc./Maxim Integrated MAX6037AAUK12+T
- Part No.:
- MAX6037AAUK12+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037AAUK12+T.pdf
- Description:
- IC VREF SERIES 1.25V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,678
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Product details
Overview
MAX6037AAUK12+T from Maxim Integrated is a precision 1.25V fixed-output, low-dropout series voltage reference with active-low shutdown, ±0.2% initial accuracy, 25ppm/°C max temperature coefficient, and 100mV max dropout at 1mA - designed for high-accuracy analog signal chains in battery-powered medical sensors and portable instrumentation.
For engineers reviewing the MAX6037AAUK12+T datasheet, MAX6037AAUK12+T pinout, MAX6037AAUK12+T application, or MAX6037AAUK12+T equivalent, key selection criteria include automotive-grade (-40°C to +125°C) operation, sub-500nA shutdown current, 5mA source/sink capability, SOT23-5 package compatibility, and stability with 0.02µF–1µF output capacitors.
Technical Context
The MAX6037AAUK12+T operates as a series-mode bandgap reference with internal trimming for 1.25V output. Its architecture supports stable regulation across 2.5V–5.5V input while maintaining low quiescent current (190–275µA) and enabling fast turn-on settling (75µs to 0.1% with 0.02µF load).
Shutdown is implemented via an active-low logic input (SHDN), reducing supply current to ≤500nA and increasing output impedance to >10MΩ when disabled. The device delivers 5mA sourcing/sinking capability with load regulation of ≤0.12%/mA and line regulation of ≤0.0096%/V over full input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.25V ±0.2% (max initial error at +25°C) |
| Tempco | 25ppm/°C (max over -40°C to +125°C; enables <±1.25mV drift in automotive environments) |
| Dropout Voltage | 100mV (max at 1mA load; allows operation from 1.35V input for 1.25V output) |
| Quiescent Current | 275µA (max; enables >1-year battery life in µA-level standby systems) |
| Shutdown Current | 500nA (max; reduces power loss during system sleep modes) |
| Load Drive | ±5mA (source/sink capability supports direct ADC biasing and op-amp reference buffering) |
| Capacitive Stability | 0.02µF to 1µF (enables use with ceramic, tantalum, or polymer output caps without oscillation) |
Pinout & Package
The MAX6037AAUK12+T is housed in a 5-pin SOT23-5 package (U5-2 code, top mark AEIV), with exposed pad not connected internally. Pin 1 is ADJ (internally connected, no external connection required for fixed 1.25V version); pin 2 is GND; pin 3 is SHDN (active-low enable); pin 4 is IN (2.5V–5.5V supply input); pin 5 is OUT (1.25V reference output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ADJ) | Adjustment terminal | Internally connected for fixed-output variants; must remain unconnected (NC) on MAX6037AAUK12+T |
| 2 (GND) | Analog ground reference | Low-impedance return path for reference current and output load; requires solid PCB ground plane |
| 3 (SHDN) | Active-low shutdown control | Pull ≤0.7V to disable output and reduce supply current to ≤500nA; tie to IN for always-on operation |
| 4 (IN) | Supply voltage input | Accepts 2.5V–5.5V; requires 0.1µF bypass capacitor to GND for noise immunity and transient response |
| 5 (OUT) | Precision reference output | Delivers stable 1.25V ±0.2%; connect 0.02µF–1µF capacitor to GND for stability and PSRR enhancement |
Key Features
| Feature | Design Value |
|---|---|
| Automotive temperature range | Specified from -40°C to +125°C - qualified for under-hood and industrial sensor applications |
| Low dropout voltage | 100mV max at 1mA - enables use with single-cell Li-ion (3.0V min) or coin-cell (2.5V min) supplies |
| Ultra-low shutdown current | ≤500nA - extends battery life in intermittent-sampling systems (e.g., wireless sensor nodes) |
| High output drive strength | ±5mA sourcing/sinking - eliminates need for external buffer in 12-bit ADC reference designs |
| Low thermal hysteresis | 485ppm (typical) - ensures repeatable voltage after thermal cycling in field-deployed equipment |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered ECG front-end with 16-bit SAR ADC requiring stable 1.25V reference. IC Role / Device Role / Timing Role: Precision voltage reference for ADC VREF input and op-amp biasing. Use Value: ±0.2% initial accuracy and 25ppm/°C tempco ensure <±2 LSB error over temperature in 16-bit conversion. |
Use Scenario: Modular PLC analog input module operating in factory ambient (-25°C to +70°C). IC Role / Device Role / Timing Role: Primary reference for isolated 24-bit ΣΔ ADC and sensor excitation circuitry. Use Value: Automotive-grade temp range and 5mA drive support direct connection to multiple downstream circuits without buffers. |
| Wireless Sensor Nodes | Automotive Cabin Monitoring |
Use Scenario: LoRaWAN node with intermittent sampling, sleeping between transmissions. IC Role / Device Role / Timing Role: Reference source enabled only during ADC conversion window. Use Value: 500nA shutdown current minimizes quiescent drain, extending 10-year battery life target. |
Use Scenario: Occupant detection system using thermopile array with precision gain calibration. IC Role / Device Role / Timing Role: Stable reference for programmable gain amplifier (PGA) offset correction. Use Value: Low thermal hysteresis (485ppm) prevents calibration drift after repeated cabin temperature cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3412ARJZ-R7 | 1.2V output, ±0.1% initial accuracy, 3ppm/°C max tempco, 125µA quiescent current | Higher precision but no shutdown; requires external enable circuitry for low-power sleep | Select when ultra-low tempco dominates over shutdown functionality and 1.2V matches system needs |
| REF3012AIDBZR | 1.2V output, ±0.2% initial accuracy, 50ppm/°C max tempco, 50µA quiescent current, no shutdown | Lower power but wider tempco and no integrated shutdown control | Select for cost-sensitive, non-automotive applications where 50ppm/°C drift is acceptable and external enable is feasible |
Compared with ADR3412ARJZ-R7 and REF3012AIDBZR, the MAX6037AAUK12+T uniquely combines automotive temperature rating, integrated active-low shutdown, and 1.25V output - making it optimal for battery-constrained, high-reliability systems requiring both precision and power-gating control.
Availability
MAX6037AAUK12+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition modules, and wireless sensor nodes requiring stable component supply with guaranteed long-term availability and automotive-grade reliability.
Supply support for MAX6037AAUK12+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and medical applications.
The MAX6037 family delivers micropower, low-dropout voltage references with shutdown for battery-operated and high-accuracy measurement systems - emphasizing stability, low drift, and wide temperature operation.
FAQ
What is the output voltage tolerance and temperature coefficient of the MAX6037AAUK12+T?
The MAX6037AAUK12+T provides a nominal 1.25V output with ±0.2% initial accuracy (max) at +25°C and a maximum temperature coefficient of 25ppm/°C over the full -40°C to +125°C automotive range. This ensures total output variation remains within ±3.125mV across temperature for critical 12-bit+ measurement systems.
Can the MAX6037AAUK12+T be used with ceramic output capacitors?
Yes, the MAX6037AAUK12+T is stable with ceramic capacitors ranging from 0.02µF to 1µF, including X7R and C0G types. Its internal compensation eliminates the need for series resistance or specialized capacitor types - simplifying layout and reducing BOM count in space-constrained designs.
How does the shutdown function operate on the MAX6037AAUK12+T?
The MAX6037AAUK12+T features an active-low SHDN pin (pin 3). Pulling SHDN ≤0.7V disables the output and reduces quiescent current to ≤500nA. During shutdown, output impedance rises above 10MΩ, effectively isolating the reference node. Tie SHDN to IN for continuous operation.
Is the MAX6037AAUK12+T pin-compatible with other MAX6037 variants?
Yes, all MAX6037 variants - including MAX6037AAUK12+T, MAX6037BAUK21+T, and MAX6037CAUK33+T - share identical 5-pin SOT23-5 (U5-2) packaging and pinout. Only the output voltage, accuracy grade, and tempco differ; no PCB redesign is needed when upgrading or substituting within the family.
What is the minimum input voltage required for proper regulation of the MAX6037AAUK12+T?
The MAX6037AAUK12+T requires a minimum input voltage of 2.5V for guaranteed operation. With its 100mV max dropout at 1mA, it regulates correctly down to VIN = 1.35V in theory - but the datasheet specifies 2.5V as the absolute minimum to ensure performance across process, voltage, and temperature corners.
MAX6037AAUK12+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- 6µVp-p
- Noise - 10Hz to 10kHz:
- 15µVrms
- Voltage - Input:
- 2.5V ~ 5.5V
- Current - Supply:
- 275µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6037AAUK12+T FAQ
1.How can I place an order for MAX6037AAUK12+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037AAUK12+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6037AAUK12+T reliable?
The price and inventory of MAX6037AAUK12+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037AAUK12+T is usually 5 days.
3.What payment methods are accepted for MAX6037AAUK12+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037AAUK12+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037AAUK12+T?
MAX6037AAUK12+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037AAUK12+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6037AAUK12+T?
For technical support, including MAX6037AAUK12+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037AAUK12+T requirements.
6.How does Aetrix verify that MAX6037AAUK12+T is sourced from the original manufacturer or authorized distributors?
All MAX6037AAUK12+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6037AAUK12+T meets industry standards.
7.What is the process for return or replacement of MAX6037AAUK12+T?
All MAX6037AAUK12+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037AAUK12+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6037AAUK12+T part is unused and in its original packaging.
Return procedure for MAX6037AAUK12+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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